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Apple Watch Ultra Heart Rate During Workout

I’ve been having problems with my Apple Watch ultra. basically as seen in the photos I’ve attached, every workout I do starts with the Apple Watch reading my heart rate and then for the next 5-10 minutes it doesn’t read at all. I’ve looked everywhere and read different forums and tried every setting possibility out there but none of it seems to work because it looks like I’m the only one with this problem, I’ve tried loosing and tightening my strap but it doesn’t effect the process. I’ve came to conclusion that this is a bug in the workout app because the heart rate sensors work and as seen they read my heart rate through the other half of my workout.


if anyone else has this problem please let me know.

Apple Watch Ultra, watchOS 9

Posted on Dec 18, 2022 1:35 PM

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Posted on Apr 1, 2023 4:01 PM

Same issues here. I got an Ultra back in mid March. I spent two weeks running totally frustrated with the HR missing more than half of my run. As soon heart beats go above 135 BPM (it seems to be my magic number) the watch gets lost and just recovers readings almost always 10+ minutes later (but still on and off). After looking around and trying tighter, looser, upper arm, inside of wrist, bla bla bla…same problems. For sanity check, I went for a run with the Ultra on my left arm and my wife’s 8 Series on my right arm. For my surprise the Ultra lost more than half as usual, 8 Series didn’t miss a beat.

I went back to Apple Store and replaced my Ultra thinking I had a defective unit. However, new unit and same old problems.

Anyway, I’m more inclined to believe it’s poor hardware/software interface. It’d be weird Apple having a different software running on 8 Series and Ultra. They might share the same software, but the weight/size/shape of the Ultra may requires a different solution (maybe even hardware…not sure if it’s the same as 8 Series).


Below Heart Readings from my last 20 minutes run and a fast pace walk at the end. Difference is abismal. Running it got just a bit more than 4 minutes readings.




I loved the Ultra: concept, design, features; and I was so looking forward to go diving with it. But there’s no point of having an outdoor smartwatch that can’t monitor heart beats.

Now it’s time to return the Ultra again and decide if I move to a 8 Series or other brands, because it’s pretty clear Apple is not concerned at all on fixing this problem. Apple isn’t the same anymore and I’m on the ecosystem since 2009!

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274 replies

Sep 4, 2023 7:24 AM in response to OmriShpigel

I’m done with the Apple Watch so called Ultra I’ve tried every fix Apple suggested even replaced the watch but it stops reading my heart rate very sporadically during my workouts indoors/ outdoors etc. I’ve looked online tried everything I know. Apple is usually very responsive to issues with their products. I guess. They are too busy preparing for their “event” than addressing the concerns of their customers. You pay a premium price and I am ok with that but I expect premium service and solutions to problems . This is a widespread issue whether. It’s software or hardware . I was going to buy another Apple smart watch but not now. So I need a new smartwatch with a good fitness tracker any suggestions Garmin? If so which one ? Appreciate any advice ? Thanks !

Sep 13, 2023 6:26 AM in response to OmriShpigel

Seems to definitely be software related. I found a possible work around. When the heart rate stops reporting in workout, I open the heart rate monitor and it shows reading from one minute ago, so I know the actual heart rate hardware is running. And as soon as I start the heart rate monitor, the heart rate in the workout immediately reappears, and remains.

Sep 13, 2023 4:27 PM in response to bilaaa

I am considering that but I heard the ultra two has improved heart rate monitor. I this rumor? Or is it true ? It solves the problem I may reconsider. Anyone else have any news on that. Otherwise I’ll start shopping for a Garmin. Did find kind of a fix I started using a sweat band where you attach your watch and that has helped with the issue but evidently Apple don’t really care and are just interested in selling their new product instead of supporting the loyal customers.

Sep 19, 2023 6:03 AM in response to RAsgp

I’m guessing it’s just how the hardware interacts with you and a different watch won’t help. I also wear a garmin for the chest strap, as the optical sensor doesn’t work well with me. Same with the garmin one in fact. Maybe some body types just don’t work as well - I have tiny wrists, a hard to find pulse compared to others, and Caucasian. Maybe any/all those factors play a role - but I don’t think a hardware swap will help.


I was happy when optical HR came out years ago, but it’s never worked well for me regardless of garmin or Apple.

Sep 24, 2023 4:56 AM in response to AleksFadini

I have had several Apple Watches. Most recently the series 6. They were all essentially flawless with heart rate recording. I just bought the Ultra 2. I wear it in the exact same position as my 6. On my first workout (rowing), it skipped recording large sections of my workout. Did fine while I was weight lifting afterward. Seems to be an Ultra issue. Very disappointing from an expensive product.

Sep 24, 2023 7:15 AM in response to AleksFadini

I found a solution that works, at least so far. I thought that the problem might be due to light getting in around the edge of my watch as I worked out. I mean you are working out so you are moving you can’t help that. So I found a sweatband on Amazon where you can attach your watch it has clips and a hole where your sensor can come in contact with your skin and I also moved it up on my forearm a little and it WORKS. My other bands always slipped down as I worked out . The sweatband doesn’t. Since I started using it almost never glitches out. So I’ll keep using it so far it’s working . I bought an ultra 2 I haven’t worked out wearing it yet. I will try with regular band and see if somehow it might be better .

Sep 24, 2023 7:21 AM in response to Btlsfn70

This could be spam, or could be real. I did notice that if I push my watch to the middle of my arm, that solves the problem, maybe because the skin around it creates a visual seal.


can you describe the band better? Is it allowed to post a link or just a picture? I’m willing to try that.


regardless, it’s an horrendous design flaw if it’s true.

Oct 2, 2023 11:24 PM in response to OmriShpigel

Hello, is there any update on this topic.

Have Ultra first release, having the same, it does stop recording with Workout up (Outdoor Run).

I follow all the instructions (position of the watch is ok, read and write data ok, seems nothing out of the ordinary) but still, randomly, having issue.If I use chest strap the issue dosent show up.

I been talking with Apple support on the phone, they flagged the possibility that 3rd party app like Strava could interfere with the heart rate sensor even if they are not running (I don’t believe this could be possible) so they could prevent sometime to have the app Workout not to read/write properly.

Ita just very frustrating.

Thank you.

Oct 3, 2023 1:30 AM in response to RAsgp

Thanks for providing more information.

I went to Apple Store and they performed a check, no issue found (sensor).

I updated to lastest OS and will test it out with a run.

Im wearing the watch like this : Right Wrist / Digital Crown on Right Side.

Is your tasting happening recently and the issue shows up with latest OS update too?

Thank you!

Apple Watch Ultra Heart Rate During Workout

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